1. C-O Bond Hydrogenolysis of Aqueous Mixtures of Sugar Polyols and Sugars over ReOx-Rh/ZrO2 Catalyst: Application to an Hemicelluloses Extracted Liquor
- Author
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Catherine Pinel, Noémie Perret, Denilson Da Silva Perez, Michèle Besson, Modibo Mounguengui-Diallo, Achraf Sadier, Eddi Noly, IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
hydrogenolysis ,Lignocellulosic biomass ,02 engineering and technology ,Xylose ,lcsh:Chemical technology ,7. Clean energy ,01 natural sciences ,Catalysis ,ReOx-Rh/ZrO2 catalysts ,lcsh:Chemistry ,chemistry.chemical_compound ,Hydrogenolysis ,Organic chemistry ,Monosaccharide ,lcsh:TP1-1185 ,Physical and Theoretical Chemistry ,Sugar ,Deoxygenation ,Bond cleavage ,chemistry.chemical_classification ,polyols ,010405 organic chemistry ,[CHIM.CATA]Chemical Sciences/Catalysis ,021001 nanoscience & nanotechnology ,[SDE.ES]Environmental Sciences/Environmental and Society ,0104 chemical sciences ,hemicelluloses extracted liquor ,chemistry ,monosaccharides ,lcsh:QD1-999 ,0210 nano-technology - Abstract
The recovery and upgrade of hemicelluloses, a family of heteropolysaccharides in wood, is a key step to making lignocellulosic biomass conversion a cost-effective sustainable process in biorefinery. The comparative selective catalytic C-O bond hydrogenolysis of C5-C6 polyols, sugars, and their mixtures for the production of valuable C6 and C5 deoxygenated products was studied at 200 °, C under 80 bar H2 over ReOx-Rh/ZrO2 catalysts. The sugars were rapidly converted to the polyols or converted into their hydrogenolysis products. Regardless of the reactants, C-O bond cleavage occurred significantly via multiple consecutive deoxygenation steps and led to the formation of linear deoxygenated C6 or C5 polyols. The distribution of products depended on the nature of the substrate and C-C bond scission was more important from monosaccharides. In addition, we demonstrated effective hydrogenolysis of a hemicellulose-extracted liquor from delignified maritime pine containing monosaccharides and low MW oligomers. Compared with the sugar-derived polyols, the mono- and oligosaccharides in the liquor were more rapidly converted to hexanediols or pentanediols. C-O bond scission was significant, giving a yield of desired deoxygenated products as high as 65%, higher than in the reaction of the synthetic mixture of glucose/xylose of the same C6/C5 sugar ratio (yield of 30%).
- Published
- 2019
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